Which Question Cannot Be Answered by Means of the Method

Multiple Choice

Which question cannot be answered by means of the method that uses a hypothesis and then a prediction?

A) Are bees more attracted to red roses than to yellow roses?
B) Are red roses more beautiful than yellow roses?
C) Why are red roses red?
D) Do red roses bloom earlier than yellow roses?
E) Are red roses more susceptible to mildew than yellow roses?